Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 946, Issue 1-2, Pages 157-162Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(01)01548-5
Keywords
counter-current chromatography; preparative chromatography; Food Color Red No. 106; acid red; dyes
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pH-Zone-refining counter-current chromatography was successfully applied to the separation of the main components of Food Color Red No. 106 (R-106, acid red, Color Index No. 45100). A 300-mg quantity of sample was separated using the following two-phase solvent system: n-butanol-water, 40 mM sulfuric acid in organic stationary phase and 30 mM ammonia in aqueous mobile phase. The obtained fractions were analyzed by high-performance liquid chromatography and fast atom bombardment mass spectrometry. The separation yielded 261.9 mg of main component of acid red with purity of 99.9%. (C) 2002 Elsevier Science B.V. All rights reserved.
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